The current migration crisis is raising public awareness to the importance of population movements. Recent studies show that 3% of the global population does not live in their native countries (see Özden et al., 2011). Population movements have been increasing since the 1960s and are becoming more and more asymmetrical: the majority of current immigration waves focus on a few countries and cities of destination. In particular, the destinations of highly qualified migrants – interesting from an economic point of view – are concentrated on a few English-speaking regions with relatively high incomes (Kerr et al., 2016). The reasons for the migration of highly skilled workers to their destination countries are manifold: On the one hand, the desire to spend one to two semesters in the destination country as an exchange student, or even to gain a foreign degree over an extended period (two to four years). On the other hand, however, political conflicts and economic crises in the country of origin can lead to the emigration of highly qualified people.